Depending on the inlet flow conditions of the ESP,additional gas deflectors are installed in the duct in front of or in the raw gas hood itself.In the event of sticking types of dust of large quanities of dust, the gas distribution devices are deducted mechanically.In this case the individual gas distribution walls are connected to each other by a rapping rod includign an anvil and are rapped by a hammers, placed on the shaft directly coupled with the gear motor.